On Sunday night, Drake rang in his 30th birthday with a celeb-filled party at Delilah in West Hollywood — and among the guest list were exes John Mayer and Taylor Swift! Gasp!

According to TMZ, T. Swift hit up the El Lay hot spot alongside her girl squad members Karlie Kloss and the Haim sisters — while the Gravity singer arrived to the club solo looking dapper in a black suit.

We're hearing that not only was the Dear John songstress in attendance but, according to the photo agency who snapped the crooner's pic (above right), so was another one of Mayer's former loves… Katy Perry! Ah!

The Laundress, a lifestyle brand, helped the rocker develop a laundry detergent product that he seems REALLY pumped about — at least based on the video recently released showing him going through his routine alongside the lifestyle company's co-founders, Gwen Whiting and Lindsey Boyd.

"I'm authentically into this," Mayer says at one point while washing and hand drying a t-shirt of his, "at some point, a man has to be a man."

But now, the younger sister of Louis, Félicité Deakin (pictured above, left, with Louis), has figured out her own way to pay tribute to her mother in a very special manner, and we are SO touched by it.

On Friday, the 16-year-old Deakin shared the following image (below), a gorgeous portrait of the family with her late mother, Johannah Deakin, surrounded by all of her children: